I'm far more interested in Type:Null than I was before. This evolution it has seems to be another attempt at man making a Pokemon only it doesn't seem to have gone as well as it did for Porygon, Golurk, and Mewtwo. And now Magearna.
The interesting part is how it sounds like its evolved form we only know as 'Silvadi' now is an attempt at creating Arceus.
Though this could mean nothing, it has been noticed that its ability, AR System, has ARSys. Arceus. I think I would like to use one on my team when given the chance, now.
I'm not sure if its actually an evolution, or a form change in the vein of Hoopa Unbound. They apparently do say evolution. And Gladion is shown using it, and even apparently can change its Type himself. So he has whatever the Memory hold item is.